The mouse over enlarge is something you can enable/disable on a per flag basis. By default it is enabled for the Side, portrait, landscape, tape, and pin flags.
If you scroll down toward the bottom of the snippet, these are the lines that create that feature. Comment out or delete the lines you donāt want active. If you donāt want it at all, you can delete the whole section listed below.
/* Zoom on Hover */
img[alt*="+side"]:not(:active):hover,
span[alt*="+portrait"]:not(:active):hover,
span[alt*="+landscape"]:not(:active):hover{
transform: scale(1.5);
}
/* zoom and reverse rotate on hover */
img[alt*="+tape"]:not(:active):hover,
img[alt*="+pin"]:not(:active):hover{
transform: scale(1.5) rotate(-2deg);
}